Carpenter's outsourcing of their regular model rods is clearly stated in Carpenter Japan's web site, and in regular print size. (even with google translate, you cannot miss this fact).
A carpenter fan myself, but unaffiliated, this openness bodes well for the company and clearly they have nothing to hide.
That being said, Wan's questions/concerns are understandable, everyone who drops a chunk of change for any product wants to know to some degree where the product is coming from, and if it's news (to him) that the product he has been buying is outsourced, understandably, concerns will pop into his mind. Perfectly normal. Yes?
Suffice to answer Wan that quality is assured and that the location/number of factory/factories cannot be disclosed for commercial reasons. But take heart that the factory is IN Japan, that in itself is reassuring enough. He did not ask for the underwear color. Although if it has "Carpenter" printed all over it like the Carpenter buff, I would like to order some.
Just my humble 2 cents.
